Thrullg

The reclusive Thrullg are hulking humanoids that feed on magical energy. They are drawn from the safety of their lairs by the unfettered use of magic in battles across Caen, and no spellcaster is safe in the vicinity of a living Thrullg. As if their magical appetites were not dangerous enough, these creatures' claws and tentacles can kill a man as easily as they drain arcane power.

Advance Deployment - Models with advance deployment are placed after normal deployment and may be placed up to 6" further forward.

Amphibious - This model treats shallow water as open terrain while advancing. While completely in shallow water, this model gains concealment and does not block line of sight.

Pathfinder - This model treats rough terrain as open terrain while advancing. While charging, slam power attacking, or trample power attacking, this model does not stop its movement when it contacts an obstacle.

Arcane Consumption - If an enemy model casts a spell while in this model's CMD range, the enemy caster immediately takes d3 damage and this caster heals d3 damage. If the enemy caster is destroyed from the damage their spell does not take effect.

In The Blindwater Congregation the Thrullg is available for free if you buy enough infantry. And even if the Thrullg doesn't normally justify its cost, free is a good cost for anything, and it has the joint most expensive base cost of any available model in the congregation (alongside the Totem Hunter)

For its cost it's amazingly vulnerable to simply getting shot; it's expensive and it's got an average DEF, average ARM, only a handful of damage boxes, and no anti-shooting tech at all. And it needs to get close to the enemy.

... but not by "lingering" secondary damage (such as the cloud left by Breath of Corruption). In this case the hazard is damaging the model, not the spell that put the hazard into play.

If a weapon/spell includes Magic Damage and another kind of elemental damage it can still damage Incorporeal models. Incorporeal models are not affected by the rule "if an attack does multiple types of damage and a model is immune to at least one it is immune to the entire attack."The phrase "immune to non-magical damage" should be interpreted as "immune to damage that doesn't include Damage Type: Magical" (not interpreted as "has immunity to Corrosion and Electricity and Cold and etc.")

If there is an upkeep on only a single model within a unit (such as Fire for Effect), then you need to hit that exact model to make it expire. It's not enough to just hit anyone in the unit (unlike most upkeep spells).

You can still benefit from Prowl even if the attacker "ignores concealment". Because even though they ignore it that doesn't change the fact that you have it, and all you need to do is have it in order to get Prowl.